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C.10.4 Capacity Upgrade on-demand Models
New in V4R5 (December 2000) , Capacity Upgrade on Demand (CUoD) capability offered for the
iSeries Model 840 enables users to start small, then increase processing capacity without disrupting any
of their current operations. To accomplish this, six processor features are available for the Model 840.
These new processor features offer a Startup number of active processors; 8-way, 12-way or 18-way ,
with additional On-Demand processors capacity built-in (Standby). The customer can add capacity in
increments of one processor (or more), up to the maximum number of On-Demand processors built into
the Model 840. CUoD has significant value for installations who want to upgrade without disruption. To
activate processors, the customer simply enters a unique activation code (“software key”) at the server
console (DST/SST screen).
The table below list the Capacity Upgrade on Demand features.
Startup Processors On-Demand Processors TOTAL Processors
(“Active”) (“Stand-by”)
840-2352 (2416) 8 4 12
840-2353 (2417) 12 6 18
840-2354 (2419) 18 6 24
Note: Features 23xx added in V5R1. Features 24xx were available in V4R5 (December 2000)
C.10.4.1 CPW Values and Interactive Features for CUoD Models
The following tables list only the processor CPW value for the Startup number of processors as well as a
processor CPW value that represents the full capacity of the server for all processors active (Startup +
On-Demand). Interpolation between these values can give an approximate rating for incremental
processor improvements, although the incremental improvements will vary by workload and because
earlier activations may take advantage of caching resources that are shared among processors.
Interactive Features are available for the Model 840 ordered with CUoD Processor Features. Interactive
performance is limited by total capacity of the active processors . When ordering FC 1546, FC 1547, or
FC 1548 one should consider that the full capacity of interactive is not available unless all of the
On-Demand processors have been activated .For more information on Capacity Upgrade on-demand, see
URL: : http://www-1.ibm.com/servers/eserver/iseries/hardware/ondemand
Note: In V5R2, CUoD features come with all standard models, which are described in the V5R2
Additions section of this appendix.
IBM i 6.1 Performance Capabilities Reference - January/April/October 2008
© Copyright IBM Corp. 2008 Appendix C CPW, CIW and MCU for System i Platform 357